Cichlid Fish Diversity Threatened by Eutrophication That Curbs Sexual Selection

Seehausen, Ole; van Alphen, JJM; Witte, F (1997). Cichlid Fish Diversity Threatened by Eutrophication That Curbs Sexual Selection. Science, 277(5333), pp. 1808-1811. American Association for the Advancement of Science 10.1126/science.277.5333.1808

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Cichlid fish species of Lake Victoria can interbreed without loss of fertility but are sexually isolated by mate choice. Mate choice is determined on the basis of coloration, and strong assortative mating can quickly lead to sexual isolation of color morphs. Dull fish col- oration, few color morphs, and low species diversity are found in areas that have become turbid as a result of recent eutrophication. By constraining color vision, turbidity interferes with mate choice, relaxes sexual selection, and blocks the mechanism of reproductive isolation. In this way, human activities that increase turbidity destroy both the mechanism of diversification and that which maintains diversity.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

09 Sep 2015 14:09

Last Modified:

09 Sep 2015 14:09

Publisher DOI:

10.1126/science.277.5333.1808

URI:

https://boris.unibe.ch/id/eprint/71541

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